Implement subscription CI/CD pipeline optimization

Description

Context: CI/CD needs optimization for faster builds and deployments.

Current Limitation: Basic CI/CD exists.

Expected Outcome: Implement optimized CI/CD pipeline.

Acceptance Criteria

• Implement parallel test execution
• Add build caching
• Implement incremental builds
• Add deployment optimizations
• Implement canary deployments
• Add deployment rollback

Technical Scope

Files Likely Affected:

• .github/workflows/ - GitHub Actions
• CI/CD configuration